I am looking to change my sand in my filter. I need #20 .40 - .55mm sand and uniformity coefficient less than 1.75. The pool store has sand but the only numbers on it are 49/20. Does that mean it's .49mm / #20?
Question about sand
- Thread starter epxroot
- Start date
I believe it does. I will let someone one else confirm though.
Why are you changing your sand? It does not have to be changed every 5 years as they say.
Have you tried deep cleaning already?
Deep Cleaning a Sand Filter
Why are you changing your sand? It does not have to be changed every 5 years as they say.
Have you tried deep cleaning already?
Deep Cleaning a Sand Filter
I wasn't going to change my sand. I bought this house 4 years ago and I am not sure when the sand was last change. For the most part my pool is very clear but, last year I started getting this dirt/dust on my pool floor. I was convinced it was mustard algae so completed the SLAM and then raised my pool up to mustard algae shock levels for 24hrs and it came back.
Anyway, I opened up last weekend and now the stuff is back. Pool is clear, passed OCLT. I don't think it's algae because it was showing up when my FC levels were at 22. It also seemed to appear quickly after I brushed my pool. So, I figured maybe my filter is not able to filter it out and that is why I was thinking about changing my sand.
Oh, and yes I have tried deep clean last year.
It looks similar to what Gdog posted in this thread.
What is this in my pool ?
Anyway, I opened up last weekend and now the stuff is back. Pool is clear, passed OCLT. I don't think it's algae because it was showing up when my FC levels were at 22. It also seemed to appear quickly after I brushed my pool. So, I figured maybe my filter is not able to filter it out and that is why I was thinking about changing my sand.
Oh, and yes I have tried deep clean last year.
It looks similar to what Gdog posted in this thread.
What is this in my pool ?
Last edited:
Ok. Just wanted to check. I am fairly certain the pool sand you found it correct. That is the same stuff I put in my filter and it is fine. Just remember to backwash and rinse the sand really well before letting it filter.
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